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A2A Indirect Prompt-Injection & Jailbreak Firewall
A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from llms-generator.agentdiet.dev, paid per call via MPP, $0.005/call, status unknown (last checked 2026-10-21).
Scans untrusted text, HTML, emails, MCP responses, or A2A payloads for hidden prompt injections and jailbreak attempts, returning sanitized output.
Price / call$0.005
Success—
StatusUnknown
How this service works
Scans untrusted web pages, emails, MCP responses, or A2A payloads for hidden prompt injections and returns sanitized text. (Live x402 v2, IETF MPP & MCP endpoint at https://llms-generator.agentdiet.dev/v1/llm-guard)
Output
Returns a JSON object containing the scan result for the submitted text, indicating whether prompt injection or jailbreak payloads were detected, along with the sanitized version of the input text safe for downstream LLM consumption.
Example use cases
Sanitize scraped web content for agent
“I'm about to feed this HTML from an external website into my agent — can you scan it for hidden prompt injections and give me the safe version to pass along?”
Screen incoming email before LLM processes it
“Check this email body for any embedded prompt injection attacks or jailbreak instructions before my AI assistant reads and summarizes it.”
Validate MCP tool response before use
“This MCP server just returned a response — can you run it through the prompt-injection firewall to make sure it's not trying to hijack my agent before I act on it?”
Technical details
Endpoint
GEThttps://llms-generator.agentdiet.dev/v1/llm-guard?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your agent pipeline ingests untrusted external content — web pages, emails, tool responses, or A2A payloads — and you need a lightweight, per-call firewall check before passing that content to an LLM. Ideal for multi-agent architectures where one agent's output becomes another's input and cross-agent prompt injection is a concern.
Side effects
- Empty or missing 'text' parameter returns a 400 validation error
- Very large payloads may time out or be truncated
- Obfuscated or novel injection techniques may evade detection
- Non-UTF-8 encoded content may cause parsing errors
- Payment not fulfilled returns HTTP 402 requiring x402 USDC payment
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| textrequired | string | Untrusted text, HTML, or tool output to scan for hidden prompt injection or jailbreak payloads |
Output
Schema · Response
{
"type": "object"
}Reviews
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